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The vertical stabilizer is the fixed vertical surface of the empennage. A vertical stabilizer or tail fin [1] [2] is the static part of the vertical tail of an aircraft. [1] The term is commonly applied to the assembly of both this fixed surface and one or more movable rudders hinged to it. Their role is to provide control, stability and trim ...
Equating forces in the vertical direction: ... is the tail force coefficient, ... is known as the tail volume ratio. Its coefficient, the ratio of the two lift ...
In February 1976, work commenced to automate the methods contained in the USAF Stability and Control DATCOM, specifically those contained in sections 4, 5, 6 and 7.The work was performed by the McDonnell Douglas Corporation under contract with the United States Air Force in conjunction with engineers at the Air Force Flight Dynamics Laboratory in Wright-Patterson Air Force Base.
A Boeing 737 uses an adjustable stabilizer, moved by a jackscrew, to provide the required pitch trim forces. Generic stabilizer illustrated. A horizontal stabilizer is used to maintain the aircraft in longitudinal balance, or trim: [3] it exerts a vertical force at a distance so the summation of pitch moments about the center of gravity is zero. [4]
An aircraft is streamlined from nose to tail to reduce drag making it advantageous to keep the sideslip angle near zero, though an aircraft may be deliberately "sideslipped" to increase drag and descent rate during landing, to keep aircraft heading same as runway heading during cross-wind landings and during flight with asymmetric power.
A vertical-tail area equal to 60 percent of the wing area was required to give the X-15 adequate directional stability. — Wendell H. Stillwell, X-15 Research Results (SP-60) Stability at hypersonic speeds was aided by side panels that could be extended from the tail to increase the overall surface area, and these panels doubled as air brakes.
The bank angle for zero sideslip is used for sizing the vertical tail and also during flight-testing to determine V MCA in-flight. The vertical tail or vertical stabilizer of a multi-engine aircraft plays a crucial role in maintaining directional control while an engine fails or is inoperative. The larger the tail, the more capable it will be ...
This produces a visible atmosphere or coma, and sometimes also a tail. Compressibility – In thermodynamics and fluid mechanics, compressibility (also known as the coefficient of compressibility [45] or isothermal compressibility [46]) is a measure of the relative volume change of a fluid or solid as a response to a pressure (or mean stress ...